问题 单项选择题

下列关于平屋顶防水的说法,正确的是( )。

A.泛水与屋面相交处应做成钝角(>90°)或圆弧(R=100~150mm)
B.柔性防水层向垂直面的上卷高度不宜小于300mm,常为350mm
C.通常在刚性防水屋面上设置分仓缝,分仓缝宽度在20mm左右
D.横向分仓缝应每隔10m设一道,且缝口在支承墙体上方

答案

参考答案:C

解析: 平屋顶的防水层是屋顶使用功能的重要组成部分,它直接影响到整个建筑的使用功能:
(1)平屋顶防水方式可分为柔性防水和刚性防水;
(2)泛水与屋面相交处应做成钝角(>135°)或圆弧(Ro=50~100mm);
(3)柔性防水层向垂直面的上卷高度不宜小于250mm,常为300mm;
(4)刚性防水屋面应设置分仓缝,分仓缝宽度在20mm左右,缝内填沥青麻丝,上部填20~30mm深油膏;
(5)横向分仓缝应每隔6~12m设一道,且缝口在支承墙体上方。

阅读理解

第二部分阅读理解(共20小题;每小题2分,满分40分)

“How can I learn English well?” This is a question many students ask. In my opinion, the most effective way is to learn lessons by heart. If you can recite the text and write it out, you’ve learned it fairly well. And if you can tell, in your own words, what the lesson says you’re a very successful learner indeed. Your English will be quite perfect.

This is a difficult task. However, if you try to learn by heart only part of each lesson, you’ll find it not half so hard as you might have thought.

Learning this way, you will make rapid progress. Of course, writing is also necessary. It helps you a lot on our way to success in English.

Equally important is to feel the language. You should be able to laugh at jokes and be shocked at bad news. When using English, try to forget your mother tongue. Instead of helping you, your own language gets in your way. So, never try to see English through translation.

1.In the writer’s opinion, the most effective way in learning English is ____.

A. to practise speaking, writing and feeling it

B. to forget your own native language

C. to translate everything into his own language

D. to memorize the English words and grammatical rules

2. “Instead of helping you, your own language gets in your way.”This sentence means that memorizing your own language can ________.

A. help you to study English well        B. stop you mastering English

C. make English easy to learn                     D. help you notice mistakes

3.Equally important is to feel the language. “to feel the language” here means_____.

A. to get a knowledge of English by touching

B. to be able to read and write English

C. to translate English into your own by imagining

D. to be able to experience the rich sensation of the language

B    

多项选择题